jet-tech

Is the 300HP Crankcase metal vent tube shorter than the 350HP vent tube? The reason I ask is that I plan on replacing the non original spread bore manifold p/n 3927184 and Rochester carburetor on my 1966 SB for a Edelbrock 2703 manifold with a Proform or Quckfuel 600 cfm carb. Just trying to get all my ducks in a row before I start taking things apart. I use this car as my daily driver. Also, I would like to find hard fuel line from pump to carb that would fit with taller manifold. I hate wasting time and $$ on parts that don't fit. Any assistance would be appreciated.

VetteRed1965

If you are talking about the lifter valley vent tube canister, the old will will work

jet-tech

I think we might be talking about the same one. The metal tube from aft of intake manifold to bottom of air cleaner.

62Jeff

A quick check of Paragon Corvette's web site shows 2 different part numbers for those parts. The pictures also are different. Additionally, my 65 had the 300 horse tube on it but the 350 horse intake/air cleaner, and I had to install the 350 horse vent tube.

The 300 horse tube:

https://www.paragoncorvette.com/p-35...327300-hp.aspx

The 350 horse tube:

https://www.paragoncorvette.com/p-35...50-365-hp.aspx

Bluestripe67

You may need to replace your fuel pump with a unit that accepts a hard line connection. I changed my pump in order to use a hard line to my AFB carb. Dennis

JohnZ

You'll need to fabricate a pump-to-carb fuel hard line - no aftermarket Holley carburetor has the same fuel inlet arrangement as the 3367 carb used on the '66 (or the 3810 carb used on the '67).